<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	private $_id;
	/**
	 * Authenticates a user.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
public function authenticate()
    {
        $user=User::model()->findByAttributes(array('username'=>$this->username));
		$this->errorCode = self::ERROR_NONE;
        if($user===null)
        {
			$this->errorCode=self::ERROR_USERNAME_INVALID;
	    }
        else 
        {
	        if($user->password!==($user->encrypt($this->password)))
	        {
				$this->errorCode=self::ERROR_PASSWORD_INVALID;
			}
        	else
        	{
            	$this->_id = $user->user_id;
			}
        }
        return !$this->errorCode;
    }
 
    public function getId()
    {
        return $this->_id;
    }
}